Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Patent
1998-11-16
2000-07-11
Lee, Kevin
Valves and valve actuation
Fluid actuated or retarded
With mechanical movement between actuator and valve
251232, 251234, 74110, 74516, F16K 3116
Patent
active
060860383
ABSTRACT:
Apparatus primarily for use in seating and unseating a valve by turning the valve stem between a fully opened and fully closed position. In one form of the invention, a lever arm attached to the valve stem is connected at one corner of a triangular shaped crank arm by a link. A second corner of the crank arm is rotatably mounted on a fixed shaft and the third corner is connected to an actuator. The shaft, the link and a pivot point on the distal end of the lever arm and are all brought into alignment along a common axis when the valve is in a fully closed position. Moving the actuator in the opposite direction breaks the alignment between the link and the crank arm and pulls the lever arm toward a valve opening position.
REFERENCES:
patent: 3317179 (1967-05-01), Willis
patent: 3474829 (1969-10-01), Scheineman
patent: 3684237 (1972-08-01), Hyde et al.
patent: 3952995 (1976-04-01), Nagumo et al.
patent: 4050670 (1977-09-01), Borg et al.
patent: 4449421 (1984-05-01), Olschewski et al.
patent: 4637243 (1987-01-01), Bond
patent: 4815696 (1989-03-01), Lonardi
patent: 5078180 (1992-01-01), Collins
patent: 5542643 (1996-08-01), Breth
patent: 5967486 (1972-08-01), McCrory et al.
Lee Kevin
Young & Franklin Inc.
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